Pneumatic lifting jack



J. A. ANGLADA. PNEUMATIC LIFTING JACK. APPLICATION FILED mum. m9.RENEWED OCT-2|,192l.

1,414,718. Patented May2,1922.

2 SHEEISSHH.I I.

2 3 I I /JJ 1 Q 54 I f E 51 Z0 54 20 g M Z i INVENTOI? ATTORNL) J. A.ANGLADA. PNEUMATIC LIFTING MCK- APPLICATION FILED IULYH, 1919. RENEWED00121, I92I. 1,414,718.

FIG. 4

l/WENTOR ATTORNEY '25 movement of t om'rcb s'rA'rss PATENT OFFICE.

JOSEPH L ANGLADA, OI JENKINTOWN, PENNSYLVANIA, ASSIGNOR F ONE-HALF TOCHARLES S. AKLEY,.OF NEW YORK, N. Y.

PNEUMATIC LIF'IING JACK.

Application filed July 14, 1919, Serial No. 310,658. Renewed October 21,1921.

To all whom it my concern:

Be it known that I, J OSEPH A. ANGLADA, a citizen of the United States,and resident of Jenkintown, county of Montgomery, and

State of Pennsylvania, have invented certain new and useful Improvementsin Pneumatic Liftin Jacks, of which the following, together wit]? theaccompanying drawings, is a s ecification.

y invention relates to pneumatically actuated lifting jacks and moreparticularly to li ht portable 'acks such as may be used for li tingautomo iles, and its object is to provide a device of this character ofsimple and inexpensive construction and eflicient in operatlon.Another-object.isto provide as a part of the device a handle by means ofwhich the jack maybe positioned. ore specifically its object is toprovide an extensible handle for this pur ose. Another object is toprovide a simp e arrangement for limiting the liftin movement of e jack.A still further object is to provi e a simple arrangement for controling the e jack by means of the positioning handle.

These and other objects of the invention will appear in the followingspecification, in which I will describe the invention, I the novelfeatures of which will be set forth in up ended claims.

ferring to the drawings, Figure 1 is a side elevation of a liftin jackwhich is made according to and embo ies this invention.

Figure 2 is a front elevation of the same device.

Figure 3 is a plan view of the device shown in Figures 1 and 2. V

Figure 4 is a sectional side of the device 4 with the positioning handleextended and with its valve opening position indicated b broken lines.The section in this figure is taken on the line 4-4 of Figure Figure 5is a partial front sectional elevation.

Like characters of reference designate corresponding parts in all of thefigures of the drawings.

10 is a c linder closed atthe bottom by a base 11 and having a cover 12at the top.

13 is a load receiving member which 15 connected with a, piston 14 inthe cylinder by a plunger 15 which passes through the cover. The pistonpreferably comprises a Specification of Letters Patent.

made of a plurality Patented May 2, 1922.

Serial No. 509,890.

downwardly faced cup washer 16, an upwardly faced flanged disk 17 aboveit and another upwardly faced flanged disk 18 within the washer, havinga central hub into which a reduced threaded end of the plunger isscrewed to hold the parts of the piston together. This construction isdecidedly simple and strong and has the advantage of fillmg the lowerend of the cylinder when it is in its lowermost position, so that butlittle air is required to give it its initial upward movement.

Air under pressure from any suitable source of pressure supply isadmitted under the iston through a check valve 20 which is pre erably anordinary tire valve, and through a passage 21 in the base. This ofcourse, causes an upward movement of the piston and the parts connectedtherewith, will continue if enough air wh ch movement is supplied, untilthe piston has reached the position indicated by dot and dash lines. at15 in Figure 4.

In the wall of the cylinder 10 is an oil hole 19 by means of which thecylinder and piston may be lubricated. When the bottom of the pistonreaches and uncovers this hole, it serves as a discharge port for thecompressed air in the cylinder and consequently arrests further upwardmovement of the piston.

22 is a discharge passage in base 11 closed by a spring pressedvalve 23the upper end of which is designated by 24.

Directly above and at either side of this valve part 24 are cars 30 inwhich is pivoted the lower end of the lower section 31 of thepositioning handle. This handle may be of telescoping parts or sections31, 32 and 33 so that it may be extended in length.

By means of this handle, connected as it is nearthe base of thecylinder, the device be laced where desired, for exam le, un er a esiredpart of an automobile without the user having to stoop or reach underthe machine.

Near its pivot, the handle section 31 is constructed to form a cam 34which whey the section is moved down into the position indicated by thedot and dash lines at 31 in Figure 4, engages valve end 24 and depressesvalve 23 to open the outlet passage 22 to discharge. This causes thepiston and the parts connected therewith to descend and of coursepivotally the rate and extent of its descent may be easily andconveniently controlled by simple movements of the handle.

The inventive thought upon-which this application is based is broa erthan the articular mechanism shown illustrative thereof and I intend nolimitations other than those imposed by the appended claims.

What I claim is:

1. A liftin jack comprising a load receiving support, uid actuated meansfor raising the support a control valve and a positioning handle movablybnnected. with the jack and arran d to control the valve.

2. A lifting jack comprising a load receiving support, a pressurecylinder and a piston, means for introducing fluid into the 0 lim der,an outlet valve, and a positioning andle movably connected with the jackand arranged to control the outlet valve.

3. A lifting jack comprising a load receiving support, a pressurecylinder and a piston, means for introducing fluid into the cylinder, anoutlet valve, and a handle pivotally connected with the jack near thelower part thereof and arranged to control the outlet valve.

4 A lifting jack comprising a load receiving support, apressure cylinderand a iston, means for introducin fluid into the cy inder, an outletvalve, an a positioning handle connected with the jack near the lowerpart thereof and a cam on said handle arranged to engage and actuate theoutlet valve.

5. A lifting jack comprising a load receiving support, a pressurecylinder and a piston,

and describe as r means for introducing fluid into the cylinder, anoutlet valve, and an extensible telescopic handle pivotally connectedwith the jack near the lower part thereof and a cam on said handlearranged to engage and actutate the outlet valve.

6. A lifting jack comprising a ressure cylinder and a piston therein,sai piston comprisin a downwardly faced cup washer and a disc avingupwar 1y faced flan s arranged to fill the space within the was er, apiston rod connected with the inner flange of said disc, and means forintroducing fluid under pressure into the cylinder, an outlet valve, anda positioning handle movably connected with the jack near the lower partthereof and arranged to control the outlet valve.

7. A lifting jack comprising a ressure cylinder and a piston t erein,sai piston comprising a downwardly faced cu washer and a disc havingupwardly face flanges arranged to fill the space within the washer, apiston rod connected with the inner flange of said disc, means forintroducing fluid under pressure into the c linder near one of its endsthe wall of said cylinder being constructe to form an orifice near theother end thereof and the piston being arranged to uncover said orificewhen it reaches the upper 'end of its travel, an outlet valve, and apositioning handle movably connected with the jack near the lower partthereof and arranged to control the outlet valve.

In witness whereof, I have hereunto set my hand this 11th day of July,1919.

JOSEPH A. ANGLADA.

Certiflute of Correction. n is hereby certified tlut the mime of theeeei nee in Letters Patent No. 1,414,713, granted m 2, 1922, npon the eneefinn of Joseph A. Angnde, of JenBneewn, Pennsylvania, for en"improvement in "Pneumatic Lifting Jacks,"

was erroneously written and printed as "Charles S. Akley, whereas saidname should have been written end printed ee' Uharlu s. Ackley, ee shownhi the records of emi nmenm in this oflioe; end that the mid lennemPeeenn should be read with this comet-ion therein that the name myconform to the record of the ease in the Potent Ofice.

Signed end sealed this 30th day of May, A. D., 1922.

-J KARL FENNING,

Acting G'onmfisn'mcr of Patents.

